Hey eyeless,

If you have standalone vaults, you’ll want to use 1Password Classic instead: https://support.1password.com/cs/1password-classic-extension/

If you open and fill from the extension itself, it should open the website in the browser it is in and not in the default browser.

In case you’re still having issues, we’d love to help you out! Send us an email to support+x@1password.com